gnu: aegisub: Fix build with Make 4.3.

* gnu/packages/patches/aegisub-make43.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/video.scm (aegisub)[source](patches): Add it.

gnu/local.mk

@@ -722,7 +722,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/aegis-test-fixup-1.patch            	\
   %D%/packages/patches/aegis-test-fixup-2.patch            	\
   %D%/packages/patches/aegisub-icu59-include-unistr.patch	\
-  %D%/packages/patches/aegisub-boost68.patch                    \
+  %D%/packages/patches/aegisub-boost68.patch			\
+  %D%/packages/patches/aegisub-make43.patch			\
   %D%/packages/patches/agg-am_c_prototype.patch			\
   %D%/packages/patches/akonadi-paths.patch		\
   %D%/packages/patches/akonadi-Revert-Make-installation-properly-relo.patch \

gnu/packages/patches/aegisub-make43.patch

@@ -0,0 +1,20 @@
+Fix build with GNU Make 4.3:
+
+https://github.com/Aegisub/Aegisub/issues/171
+
+Patch taken from upstream:
+
+https://github.com/Aegisub/Aegisub/commit/6bd3f4c26b8fc1f76a8b797fcee11e7611d59a39
+
+diff --git a/Makefile.target b/Makefile.target
+--- a/Makefile.target
++++ b/Makefile.target
+@@ -112,7 +112,7 @@ POST_FLAGS = $($@_FLAGS) -c -o $@ $<
+ # Libraries contain all object files they depend on (but they may depend on other files)
+ # Not using libtool on OS X because it has an unsilenceable warning about a
+ # compatibility issue with BSD 4.3 (wtf)
+-lib%.a: $$($$*_OBJ)
++lib%.a: $$($$(*F)_OBJ)
+ 	@$(BIN_MKDIR_P) $(dir $@)
+ 	$(BIN_AR) cru $@ $(filter %.o,$^)
+ 	$(BIN_RANLIB) $@

gnu/packages/video.scm

@@ -3249,6 +3249,7 @@ programmers to access a standard API to open and decompress media files.")
                (base32
                 "11b83qazc8h0iidyj1rprnnjdivj1lpphvpa08y53n42bfa36pn5"))
               (patches (search-patches "aegisub-icu59-include-unistr.patch"
+                                       "aegisub-make43.patch"
                                        "aegisub-boost68.patch"))))
     (build-system gnu-build-system)
     (arguments