Cmake: Allow build on HP PA-RISC host machine

Fix this configure stage error:
-- LLVM host triple: hppa1.1-unknown-linux-gnu
CMake Error at cmake/config-ix.cmake:516 (message):
  Unknown architecture hppa1.1

Author: Helge

llvm/cmake/config-ix.cmake

@@ -512,6 +512,10 @@ elseif (LLVM_NATIVE_ARCH STREQUAL "m68k")
   set(LLVM_NATIVE_ARCH M68k)
 elseif (LLVM_NATIVE_ARCH MATCHES "loongarch")
   set(LLVM_NATIVE_ARCH LoongArch)
+elseif (LLVM_NATIVE_ARCH MATCHES "hppa1.1")
+  set(LLVM_NATIVE_ARCH HPPA)
+elseif (LLVM_NATIVE_ARCH MATCHES "hppa64")
+  set(LLVM_NATIVE_ARCH HPPA)
 else ()
   message(FATAL_ERROR "Unknown architecture ${LLVM_NATIVE_ARCH}")
 endif ()