BaseTools: Add LoongArch64 binding.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4053

Add LoongArch64 ProcessorBin.h and add LoongArch to Makefiles.

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Yuwei Chen <yuwei.chen@intel.com>

Signed-off-by: Chao Li <lichao@loongson.cn>
Co-authored-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

BaseTools/Source/C/GNUmakefile

@@ -29,6 +29,9 @@ ifndef HOST_ARCH
   ifneq (,$(findstring riscv64,$(uname_m)))
     HOST_ARCH=RISCV64
   endif
+  ifneq (,$(findstring loongarch64,$(uname_m)))
+    HOST_ARCH=LOONGARCH64
+  endif
   ifndef HOST_ARCH
     $(info Could not detected HOST_ARCH from uname results)
     $(error HOST_ARCH is not defined!)