8354908: javac mishandles supplementary character in character literal #1099

Job	Run time
Prepare the run	7s
linux-x64 / build (release)	26m 19s
linux-x64 / build (debug)	30m 33s
linux-x64-static / build (release)	30m 58s
linux-x64-hs-zero	0s
macos-x64	0s
alpine-linux-x64	0s
linux-x64-hs-nopch	0s
docs	0s
linux-x64-static-libs	0s
windows-aarch64	0s
macos-aarch64	0s
linux-x64-hs-minimal	0s
macos-aarch64	0s
windows-x64	0s
linux-cross-compile	0s
linux-x64-hs-optimized	0s
windows-x64	0s
linux-x64 / test (jdk/tier1 part 3)	7m 1s
linux-x64 / test (jdk/tier1 part 2)	13m 33s
linux-x64 / test (jdk/tier1 part 1)	23m 49s
linux-x64 / test (langtools/tier1)	20m 46s
linux-x64 / test (hs/tier1 gc)	24m 1s
linux-x64 / test (hs/tier1 common)	3m 12s
linux-x64 / test (hs/tier1 compiler part 1)	18m 19s
linux-x64 / test (hs/tier1 compiler part 2)	11m 38s
linux-x64 / test (hs/tier1 compiler part 3)	36m 10s
linux-x64 / test (hs/tier1 runtime)	21m 23s
linux-x64 / test (lib-test/tier1)	3m 4s
linux-x64 / test (hs/tier1 serviceability)	13m 21s
	4h 44m 14s

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