put Git instructions back into deps/Makefile

still being used for mac binaries, ref
#8820 (comment)

deps/Makefile

@@ -1679,6 +1679,43 @@ compile-patchelf: $(PATCHELF_SOURCE)
 check-patchelf: patchelf-$(PATCHELF_VER)/checked
 install-patchelf: $(PATCHELF_TARGET)
 
+## Git
+# only used for the mac binaries in contrib/mac/app/Makefile
+
+GIT_SOURCE = git-$(GIT_VER)/src/git
+GIT_TARGET = $(build_prefix)/git
+
+git-$(GIT_VER).tar.gz:
+	$(JLDOWNLOAD) $@ http://git-core.googlecode.com/files/$@
+git-$(GIT_VER)/configure: git-$(GIT_VER).tar.gz
+	$(JLCHECKSUM) $<
+	$(TAR) zxf $<
+	touch -c $@
+git-$(GIT_VER)/config.status: git-$(GIT_VER)/configure
+	cd git-$(GIT_VER) && \
+	./configure $(CONFIGURE_COMMON) --bindir="$(build_libexecdir)"
+	touch -c $@
+$(GIT_SOURCE): git-$(GIT_VER)/config.status
+	$(MAKE) -C git-$(GIT_VER)
+	touch -c $@
+git-$(GIT_VER)/checked: $(GIT_SOURCE)
+	echo 1 > $@
+$(GIT_TARGET): $(GIT_SOURCE) git-$(GIT_VER)/checked
+	$(MAKE) -C git-$(GIT_VER) install NO_INSTALL_HARDLINKS=1 $(MAKE_COMMON)
+	touch -c $@
+
+clean-git:
+	-$(MAKE) -C git-$(GIT_VER) clean
+	-rm -f $(GIT_OBJ_TARGET)
+distclean-git:
+	-rm -rf git-$(GIT_VER).tar.gz git-$(GIT_VER)
+
+get-git: git-$(GIT_VER).tar.gz
+configure-git: git-$(GIT_VER)/config.status
+compile-git: $(GIT_SOURCE)
+check-git: git-$(GIT_VER)/checked
+install-git: $(GIT_TARGET)
+
 ## virtualenv
 
 VIRTUALENV_SOURCE = virtualenv-$(VIRTUALENV_VER)/virtualenv.py

deps/Versions.make

@@ -13,5 +13,6 @@ OSXUNWIND_VER = 0.0.1
 GMP_VER=6.0.0
 MPFR_VER=3.1.2
 PATCHELF_VER = 0.8
+GIT_VER = 1.8.2.3
 VIRTUALENV_VER = 1.11.6
 LIBGIT2_VER = 0.21.2