X64 base regs (#1166)

* x86: setup FS & GS base

* Fixed base register writes for x64, removed then for x16/x32 (the don't exist there?)

* FS reg comes before GS so the base regs do so, too

* added shebang to const_generator.py

* Added base regs to and added 'all' support to const_generator

Co-authored-by: naq <aquynh@gmail.com>

include/unicorn/x86.h

@@ -89,6 +89,8 @@ typedef enum uc_x86_reg {
 	UC_X86_REG_FPTAG,
     UC_X86_REG_MSR, // Model-Specific Register
     UC_X86_REG_MXCSR,
+    UC_X86_REG_FS_BASE, // Base regs for x86_64
+    UC_X86_REG_GS_BASE,
     UC_X86_REG_ENDING		// <-- mark the end of the list of registers
 } uc_x86_reg;