Makefile: enable compilation on uclibc

Original-patch-by: Natanael Copa <natanael.copa@gmail.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Makefile

@@ -93,6 +93,9 @@ CFLAGS += -DCGIT_CONFIG='"$(CGIT_CONFIG)"'
 CFLAGS += -DCGIT_SCRIPT_NAME='"$(CGIT_SCRIPT_NAME)"'
 CFLAGS += -DCGIT_CACHE_ROOT='"$(CACHE_ROOT)"'
 
+ifdef NO_ICONV
+	CFLAGS += -DNO_ICONV
+endif
 
 cgit: $(OBJECTS) libgit
 	$(QUIET_CC)$(CC) $(CFLAGS) $(LDFLAGS) -o cgit $(OBJECTS) $(EXTLIBS)