Merge branch 'cc/aix-has-fileno-as-a-macro'

AIX shared the same build issues with other BSDs around fileno(fp),
which has been corrected.

* cc/aix-has-fileno-as-a-macro:
  Makefile: use fileno macro work around on AIX

Author: gitster

config.mak.uname

@@ -271,6 +271,7 @@ ifeq ($(uname_S),AIX)
 	INTERNAL_QSORT = UnfortunatelyYes
 	NEEDS_LIBICONV = YesPlease
 	BASIC_CFLAGS += -D_LARGE_FILES
+	FILENO_IS_A_MACRO = UnfortunatelyYes
 	ifeq ($(shell expr "$(uname_V)" : '[1234]'),1)
 		NO_PTHREADS = YesPlease
 	else