gcc: update to 7.5.0

target/config/Config.in.compiler

@@ -50,7 +50,7 @@ config ADK_TOOLCHAIN_GCC_8
 	depends on !ADK_TARGET_CPU_ARM_CORTEX_A53
 
 config ADK_TOOLCHAIN_GCC_7
-	bool "7.4.0"
+	bool "7.5.0"
 	depends on !ADK_TARGET_ARCH_ARC
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_CSKY

toolchain/gcc/Makefile.inc

@@ -19,8 +19,8 @@ DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.xz
 LIBSTDCXXVER:=		24
 endif
 ifeq ($(ADK_TOOLCHAIN_GCC_7),y)
-PKG_VERSION:=		7.4.0
-PKG_HASH:=		eddde28d04f334aec1604456e536416549e9b1aa137fc69204e65eb0c009fe51
+PKG_VERSION:=		7.5.0
+PKG_HASH:=		b81946e7f01f90528a1f7352ab08cc602b9ccc05d4e44da4bd501c5a189ee661
 PKG_SITES:=		${MASTER_SITE_GNU:=gcc/gcc-${PKG_VERSION}/}
 PKG_RELEASE:=		1
 DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.xz