package/gcc-bare-metal: bump to gcc 15.1.0

This patch bumps gcc-bare-metal to gcc 15.1.0.

See here for changes:
https://gcc.gnu.org/gcc-15/changes.html

Signed-off-by: Neal Frager <neal.frager@amd.com>

package/gcc-bare-metal/14.2.0

@@ -1 +0,0 @@
-../gcc/14.2.0/

package/gcc-bare-metal/15.1.0

@@ -0,0 +1 @@
+../gcc/15.1.0/

package/gcc-bare-metal/gcc-bare-metal.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GCC_BARE_METAL_VERSION = 14.2.0
+GCC_BARE_METAL_VERSION = 15.1.0
 GCC_BARE_METAL_SITE = $(BR2_GNU_MIRROR)/gcc/gcc-$(GCC_BARE_METAL_VERSION)
 GCC_BARE_METAL_SOURCE = gcc-$(GCC_BARE_METAL_VERSION).tar.xz