Minor cc_cmake_snapshot touch-ups

- Partial support for arm64 hosts (no prebuilts yet)
- Replace incorrect template function use MATCHES with STREQUAL
- Add more ignored system libs
- No need to explicitly add libc++ prebuilt

Bug: 285204695
Test: m binder_sdk
Change-Id: Id6508cc9f9ee6328c95c2821c325629f84eda138

cc/cmake_ext_add_aidl_library.txt

@@ -25,7 +25,7 @@ function(add_aidl_library NAME LANG AIDLROOT SOURCES AIDLFLAGS)
         endif()
 
         set(DEPFILE_ARG)
-        if (NOT ${CMAKE_GENERATOR} MATCHES "Unix Makefiles")
+        if (NOT ${CMAKE_GENERATOR} STREQUAL "Unix Makefiles")
             set(DEPFILE_ARG DEPFILE "${GEN_SOURCE}.d")
         endif()
 
@@ -57,7 +57,7 @@ function(add_aidl_library NAME LANG AIDLROOT SOURCES AIDLFLAGS)
         "${GEN_DIR}/include"
     )
 
-    if (${LANG} MATCHES "ndk")
+    if (${LANG} STREQUAL "ndk")
         set(BINDER_LIB_NAME "libbinder_ndk_sdk")
     else()
         set(BINDER_LIB_NAME "libbinder_sdk")