i386: clone() asm clobbers too many registers w/-fsanitize=address

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I've been compiling google breakpad with -fsanitize=address option for a while 
now but since I've updated my toolchain from gcc 4.8.3 to 4.9.1, it does not 
compile anymore with the AdressSanitizer flag.

The following error occurs :
./src/third_party/lss/linux_syscall_support.h: In member function 'bool 
google_breakpad::ExceptionHandler::GenerateDump(google_breakpad::ExceptionHandle
r::CrashContext*)':
./src/third_party/lss/linux_syscall_support.h:1828:74: error: 'asm' operand has 
impossible constraints
                            : "esp", "memory", "ecx", "edx", "esi", "edi");

I'm currently cross-compiling from windows using gcc 4.9.1 provided by 
SourceryCodebench toolchain

GoogleBreakpad is currently using r31, I've tried to update to r34 but the same 
error still occurs

Original issue reported on code.google.com by david.ga...@gmail.com on 9 Mar 2015 at 10:01