Merge branch 'rj/hdr-check-gcrypt-fix'

The set of header files used by "make hdr-check" unconditionally
included sha256/gcrypt.h, even when it is not used, causing the
make target to fail.  We now skip it when GCRYPT_SHA256 is not in
use.

* rj/hdr-check-gcrypt-fix:
  Makefile: fix 'hdr-check' when GCRYPT not installed

Author: gitster

Makefile

@@ -2749,7 +2749,10 @@ $(SP_OBJ): %.sp: %.c GIT-CFLAGS FORCE
 sparse: $(SP_OBJ)
 
 GEN_HDRS := command-list.h unicode-width.h
-EXCEPT_HDRS := $(GEN_HDRS) compat% xdiff%
+EXCEPT_HDRS := $(GEN_HDRS) compat/% xdiff/%
+ifndef GCRYPT_SHA256
+	EXCEPT_HDRS += sha256/gcrypt.h
+endif
 CHK_HDRS = $(filter-out $(EXCEPT_HDRS),$(patsubst ./%,%,$(LIB_H)))
 HCO = $(patsubst %.h,%.hco,$(CHK_HDRS))