build: correct platform spelling to ensure linkage

The platform identifier spelling is case sensitive and we would fail to
link to `liblog` resulting in underlinking. This corrects the spelling
and underlinking as a consequence.

Author: compnerd

CMakeLists.txt

@@ -80,7 +80,7 @@ target_link_libraries(FirebaseCore PUBLIC
 target_link_libraries(FirebaseCore PRIVATE
   firebase_app
   flatbuffers
-  $<$<PLATFORM_ID:ANDROID>:log>
+  $<$<PLATFORM_ID:Android>:log>
   $<$<PLATFORM_ID:Windows>:libcurl>
   $<$<PLATFORM_ID:Windows>:zlibstatic>)
 if(ANDROID)