Add HPPA(PA-RISC) architecture

[R33v0LT]

This PR adds HPPA 1.1/2.0 support
A checklist of necessary steps before changing the state from the draft:

• HPPA 1.1 instructions support
• HPPA 2.0 instructions support
• Support instruction details
• cstests for all versions
• Python bindings/tests

[Rot127]

Left some suggestions. Good work!

[Rot127]

Good job!
I added many comments, though some are duplicates and none of them should be much work.
Just many tiny things.

Please, when you have resolved all of them, we need to do at least two more things:

1. Add HPPA to the .github/labeler.yml
2. Run clang-format on all .c and .h files. The formatting is a little messed up. There is a .clang-format file in the repo root. Please use this one.
3. Fuzzing. Every byte combination from 0x0-0xffffffff should work without segfault. Please, apply the following patch:

   diff --git a/cstool/cstool.c b/cstool/cstool.c
   index 2240ce132..4b6b62887 100644
   --- a/cstool/cstool.c
   +++ b/cstool/cstool.c
   @@ -607,6 +607,19 @@ int main(int argc, char **argv)
    		cs_option(handle, CS_OPT_DETAIL, CS_OPT_DETAIL_REAL);
    	}
    
   +	uint32_t bytes = 0xffffffff;
   +	while (address == 0xffffffff) {
   +		printf("\r0x%08x\t\t", bytes);
   +		fflush(stdout);
   +		count = cs_disasm(handle, (uint8_t*)&bytes, 4, address, 0, &insn);
   +		if (insn && insn->detail)
   +			free(insn->detail);
   +		free(insn);
   +		bytes++;
   +		if (bytes == 0xffffffff)
   +			return 0;
   +	}
   +
    	count = cs_disasm(handle, assembly, size, address, 0, &insn);
    	if (count > 0) {
    		size_t i;

   and test with and without details:

   ./cstool -d hppa11 0 0xffffffff
   ./cstool hppa11 0 0xffffffff
   ./cstool -d hppa20w 0 0xffffffff
   ./cstool hppa20w 0 0xffffffff
   

[Rot127]

@R33v0LT Please request my review when you're done. Checking the changes in total is easier.

[Rot127]

Almost forgot, please add the HPPA files to the .github/labeler.yml. Label name is: HPPA

[R33v0LT]

Good job! I added many comments, though some are duplicates and non of them should be much work. Just many tiny things.

Please, when you have resolved all of them, we need to do at least two more things:

1. Add HPPA to the .github/labeler.yml

2. Run clang-format on all .c and .h files. The formatting is a little messed up. There is a .clang-format file in the repo root. Please use this one.

3. Fuzzing. Every byte combination from 0x0-0xffffffff should work without segfault. Please, apply the following patch:

   diff --git a/cstool/cstool.c b/cstool/cstool.c
   index 2240ce132..4b6b62887 100644
   --- a/cstool/cstool.c
   +++ b/cstool/cstool.c
   @@ -607,6 +607,19 @@ int main(int argc, char **argv)
    		cs_option(handle, CS_OPT_DETAIL, CS_OPT_DETAIL_REAL);
    	}
    
   +	uint32_t bytes = 0xffffffff;
   +	while (address == 0xffffffff) {
   +		printf("\r0x%08x\t\t", bytes);
   +		fflush(stdout);
   +		count = cs_disasm(handle, (uint8_t*)&bytes, 4, address, 0, &insn);
   +		if (insn && insn->detail)
   +			free(insn->detail);
   +		free(insn);
   +		bytes++;
   +		if (bytes == 0xffffffff)
   +			return 0;
   +	}
   +
    	count = cs_disasm(handle, assembly, size, address, 0, &insn);
    	if (count > 0) {
    		size_t i;

   and test with and without details:

   ./cstool -d hppa11 0 0xffffffff
   ./cstool hppa11 0 0xffffffff
   ./cstool -d hppa20w 0 0xffffffff
   ./cstool hppa20w 0 0xffffffff
   

Done without faults

[Rot127]

Found a few more. Please fix them as well.

[Rot127]

Very nice!
@kabeor Please take a look.

[kabeor]

Looks really good, thank you again! Merged.