gcc: add cc symlink

fixes #14755

Signed-off-by: Dirk Neukirchen <plntyk.lede@plntyk.name>

devel/gcc/Makefile

@@ -24,7 +24,7 @@ endef
 PKG_NAME:=gcc
 # PKG_VERSION=7.3.0
 PKG_VERSION=7.4.0
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 PKG_SOURCE_URL:=@GNU/gcc/gcc-$(PKG_VERSION)
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_INSTALL:=1
@@ -192,6 +192,7 @@ define Package/gcc/install
 	ln -s $(REAL_GNU_TARGET_NAME)-g++ $(1)/usr/bin/g++
 	ln -s $(REAL_GNU_TARGET_NAME)-g++ $(1)/usr/bin/$(REAL_GNU_TARGET_NAME)-c++
 	ln -s $(REAL_GNU_TARGET_NAME)-gcc $(1)/usr/bin/gcc
+	ln -s $(REAL_GNU_TARGET_NAME)-gcc $(1)/usr/bin/cc
 	ln -s $(REAL_GNU_TARGET_NAME)-gcc $(1)/usr/bin/$(REAL_GNU_TARGET_NAME)-gcc-$(PKG_VERSION)
 	cp -ar $(PKG_INSTALL_DIR)/usr/lib/gcc $(1)/usr/lib
 	cp -ar $(TOOLCHAIN_DIR)/include $(1)/usr