Bump gcc branch to 12.2 release. (#1128)

* Bump gcc branch to 12.2 release.

* Adjust line style in allowlist

gcc

@@ -1 +1 @@
-Subproject commit 1ea978e3066ac565a1ec28a96a4d61eaf38e2726
+Subproject commit 2ee5e4300186a92ad73f1a1a64cb918dc76c8d67

test/allowlist/gcc/common.log

@@ -30,6 +30,9 @@ FAIL: gcc.dg/pr102892-1.c
 #
 # Upstream fail cases due to tree dump check
 #
+# Patch by Palmer:
+# https://gcc.gnu.org/pipermail/gcc-patches/2022-September/600932.html
+#
 FAIL: gcc.dg/tree-ssa/ssa-sink-18.c
 #
 # Upstream fixed cases
@@ -40,3 +43,5 @@ FAIL: gcc.dg/debug/btf/btf-datasec-1.c
 # By Jiawei:
 #   https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=dc32901a0221a43e121591b9819b4e33bcc2fd0a
 FAIL: g++.dg/opt/const7.C
+#   https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=b18e5d7e5f9df69759f0fbc2bed91d5e51313e79
+FAIL: gcc.target/riscv/pr105666.c