8056897: Improve error recovery for empty binary and hexadecimal literals.
Reviewed-by: mcimadamore
BadUnderscoreLiterals.java:15:15: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:19:19: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:22:16: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:23:17: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:26:16: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:27:17: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:30:17: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:31:18: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:32:19: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:33:19: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:34:18: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:35:19: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:38:19: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:39:20: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:40:21: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:41:22: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:42:21: compiler.err.illegal.underscore
BadUnderscoreLiterals.java:43:22: compiler.err.illegal.underscore
18 errors