cmake : noramlize case (#1129)

CMakeLists.txt

@@ -330,39 +330,39 @@ add_compile_definitions(_XOPEN_SOURCE=600)
 # Somehow in OpenBSD whenever POSIX conformance is specified
 # some string functions rely on locale_t availability,
 # which was introduced in POSIX.1-2008, forcing us to go higher
-IF (CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
+if (CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
     remove_definitions(-D_XOPEN_SOURCE=600)
     add_compile_definitions(_XOPEN_SOURCE=700)
-ENDIF()
+endif()
 
 # Data types, macros and functions related to controlling CPU affinity
 # are available on Linux through GNU extensions in libc
-IF (CMAKE_SYSTEM_NAME MATCHES "Linux")
+if (CMAKE_SYSTEM_NAME MATCHES "Linux")
     add_compile_definitions(_GNU_SOURCE)
-ENDIF()
+endif()
 
 # RLIMIT_MEMLOCK came in BSD, is not specified in POSIX.1,
 # and on macOS its availability depends on enabling Darwin extensions
 # similarly on DragonFly, enabling BSD extensions is necessary
-IF (CMAKE_SYSTEM_NAME MATCHES "Darwin")
+if (CMAKE_SYSTEM_NAME MATCHES "Darwin")
     add_compile_definitions(_DARWIN_C_SOURCE)
-ENDIF()
-IF (CMAKE_SYSTEM_NAME MATCHES "DragonFly")
+endif()
+if (CMAKE_SYSTEM_NAME MATCHES "DragonFly")
     add_compile_definitions(_DARWIN_C_SOURCE)
-ENDIF()
+endif()
 
 # alloca is a non-standard interface that is not visible on BSDs when
 # POSIX conformance is specified, but not all of them provide a clean way
 # to enable it in such cases
-IF (CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
+if (CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
     add_compile_definitions(__BSD_VISIBLE)
-ENDIF()
-IF (CMAKE_SYSTEM_NAME MATCHES "NetBSD")
+endif()
+if (CMAKE_SYSTEM_NAME MATCHES "NetBSD")
     add_compile_definitions(_NETBSD_SOURCE)
-ENDIF()
-IF (CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
+endif()
+if (CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
     add_compile_definitions(_BSD_SOURCE)
-ENDIF()
+endif()
 
 if (WHISPER_PERF)
     set(WHISPER_EXTRA_FLAGS ${WHISPER_EXTRA_FLAGS} -DGGML_PERF)