Yield from `create_makefile` in bundled gems too #4823

Job	Run time
omnibus compilations, trigger	1s
omnibus compilations, #2	30m 32s
omnibus compilations, #3	25m 5s
omnibus compilations, #1	28m 44s
omnibus compilations, #6	27m 15s
omnibus compilations, #4	25m 38s
omnibus compilations, #7	25m 38s
omnibus compilations, #8	26m 29s
omnibus compilations, #9	27m 56s
omnibus compilations, #11	26m 13s
omnibus compilations, #12	23m 26s
omnibus compilations, #10	26m 16s
omnibus compilations, #5	26m 16s
omnibus compilations, result	1s
	5h 19m 30s

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