Ruby

Setup clang format for C code #6612

Job	Run time
valgrind	54m 7s
test (3.1, test)	3m 7s
test (3.2, test)	3m 18s
test (3.3, test)	3m 27s
test (3.4, test)	2m 46s
test (head, test)	3m 33s
test (head, stdlib_test rubocop)	3m 20s
test (3.4, stdlib_test)	3m 29s
test (3.4, test, --enable-frozen-string-literal)	3m 27s
test (3.4, stdlib_test, --enable-frozen-string-literal)	3m 27s
test (3.4, lexer templates compile confirm_lexer confirm_templates)	4m 20s
test (3.4, rubocop validate test_doc build test_generate_stdlib raap)	2m 57s
test (3.4, typecheck_test)	1m 13s
	1h 32m 31s

Provide feedback