Fix make install

Originally committed as revision 22245 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -1486,7 +1486,7 @@ SLIBSUF=".so"
 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
-LIB_INSTALL_EXTRA_CMD='$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
+LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
 
 CC_O='-o $@'
 

subdir.mak

@@ -78,7 +78,7 @@ install-lib$(NAME)-shared: MSG = $(LIBDIR)/$(SLIBNAME)
 install-lib$(NAME)-static: $(SUBDIR)$(LIBNAME)
 	$(Q)mkdir -p "$(LIBDIR)"
 	$$(INSTALL) -m 644 $$< "$(LIBDIR)"
-	$$(LIB_INSTALL_EXTRA_CMD)
+	$(LIB_INSTALL_EXTRA_CMD)
 
 install-lib$(NAME)-headers: $(addprefix $(SUBDIR),$(HEADERS) $(BUILT_HEADERS))
 	$(Q)mkdir -p "$(INCINSTDIR)"