[gtk-osx] Restore libnettle patch to the repo.

[John Ralls <jralls src gnome org>]

commit a1b5f05f67a72282f7ef230a989044a64655f17d
Author: John Ralls <jralls ceridwen us>
Date:   Sun Apr 19 15:28:19 2020 -0700

    Restore libnettle patch to the repo.
    
    For users who haven't yet upgraded local modulesets.

 patches/libnettle-cc-for-build-needs-cflags.patch | 39 +++++++++++++++++++++++
 1 file changed, 39 insertions(+)
---
diff --git a/patches/libnettle-cc-for-build-needs-cflags.patch 
b/patches/libnettle-cc-for-build-needs-cflags.patch
new file mode 100644
index 0000000..cf4a5ae
--- /dev/null
+++ b/patches/libnettle-cc-for-build-needs-cflags.patch
@@ -0,0 +1,39 @@
+diff -c /Users/john/Development/Gramps-Build/gramps-41-git-Leopard/src/nettle-2.7.1/Makefile.in\~ 
/Users/john/Development/Gramps-Build/gramps-41-git-Leopard/src/nettle-2.7.1/Makefile.in
+--- a/Makefile.in      Tue May 28 07:21:53 2013
++++ b/Makefile.in      Sun Feb 22 15:31:18 2015
+@@ -229,27 +229,27 @@
+ # executable. Avoid object file targets to make it easy to run the
+ # right compiler.
+ aesdata$(EXEEXT_FOR_BUILD): aesdata.c
+-      $(CC_FOR_BUILD) `test -f aesdata.c || echo '$(srcdir)/'`aesdata.c \
++      $(CC_FOR_BUILD) $(CFLAGS) `test -f aesdata.c || echo '$(srcdir)/'`aesdata.c \
+       -o aesdata$(EXEEXT_FOR_BUILD)
+ 
+ desdata$(EXEEXT_FOR_BUILD): desdata.c
+-      $(CC_FOR_BUILD) `test -f desdata.c || echo '$(srcdir)/'`desdata.c \
++      $(CC_FOR_BUILD) $(CFLAGS) `test -f desdata.c || echo '$(srcdir)/'`desdata.c \
+       -o desdata$(EXEEXT_FOR_BUILD)
+ 
+ twofishdata$(EXEEXT_FOR_BUILD): twofishdata.c
+-      $(CC_FOR_BUILD) `test -f twofishdata.c || echo '$(srcdir)/'`twofishdata.c \
++      $(CC_FOR_BUILD) $(CFLAGS) `test -f twofishdata.c || echo '$(srcdir)/'`twofishdata.c \
+       -o twofishdata$(EXEEXT_FOR_BUILD)
+ 
+ shadata$(EXEEXT_FOR_BUILD): shadata.c
+-      $(CC_FOR_BUILD) `test -f shadata.c || echo '$(srcdir)/'`shadata.c -lm \
++      $(CC_FOR_BUILD) $(CFLAGS) `test -f shadata.c || echo '$(srcdir)/'`shadata.c -lm \
+       -o shadata$(EXEEXT_FOR_BUILD)
+ 
+ gcmdata$(EXEEXT_FOR_BUILD): gcmdata.c
+-      $(CC_FOR_BUILD) `test -f gcmdata.c || echo '$(srcdir)/'`gcmdata.c \
++      $(CC_FOR_BUILD) $(CFLAGS) `test -f gcmdata.c || echo '$(srcdir)/'`gcmdata.c \
+       -o gcmdata$(EXEEXT_FOR_BUILD)
+ 
+ eccdata$(EXEEXT_FOR_BUILD): eccdata.c mini-gmp.c mini-gmp.h
+-      $(CC_FOR_BUILD) `test -f eccdata.c || echo '$(srcdir)/'`eccdata.c \
++      $(CC_FOR_BUILD) $(CFLAGS) `test -f eccdata.c || echo '$(srcdir)/'`eccdata.c \
+       -o eccdata$(EXEEXT_FOR_BUILD)
+ 
+ # desCore rules
+
+Diff finished.  Sun Feb 22 15:31:34 2015