Ruby

Restrict the execution of the valgrind task to when the C code has been modified. #7023

Job	Run time
valgrind	52m 12s
test (3.2, test)	3m 7s
test (3.1, test)	3m 15s
test (3.4, test)	3m 27s
C99_compile (3.4)	58s
test (3.4, test, --enable-frozen-string-literal)	3m 32s
test (head, test)	3m 42s
C99_compile (head)	1m 30s
test (3.3, test)	3m 30s
test (head, stdlib_test rubocop)	3m 12s
test (3.4, stdlib_test)	2m 52s
test (3.4, rubocop validate test_doc build test_generate_stdlib raap)	2m 52s
test (3.4, typecheck_test)	1m 15s
test (3.4, stdlib_test, --enable-frozen-string-literal)	2m 37s
	1h 28m 1s

Provide feedback