tools/gmp: update to 6.3

Release Notes:
https://gmplib.org/gmp6.3

Signed-off-by: Nick Hainke <[email protected]>

tools/gmp/Makefile

@@ -7,11 +7,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=gmp
-PKG_VERSION:=6.2.1
+PKG_VERSION:=6.3.0
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GNU/gmp/
-PKG_HASH:=fd4829912cddd12f84181c3451cc752be224643e87fac497b69edddadc49b4f2
+PKG_HASH:=a3c2b80201b89e68616f4ad30bc66aee4927c3ce50e33929ca819d5c43538898
 PKG_CPE_ID:=cpe:/a:gmplib:gmp
 
 HOST_FIXUP:=autoreconf