(cherry-pick): Fix a lot of comments, regarding argv/argc -> objv/objc #1527

Job	Run time
test (gcc)	4m 23s
build (gcc)	2m 2s
test (gcc, --disable-xft)	4m 15s
test (gcc, --enable-symbols)	3m 35s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 44s
build (gcc, --disable-xft)	2m 11s
build (gcc, --disable-xss)	1m 45s
build (gcc, --enable-symbols)	1m 25s
build (clang)	1m 54s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 54s
build (clang, --disable-xft)	1m 53s
build (clang, --disable-xss)	2m 11s
build (clang, --enable-symbols)	1m 47s
	30m 59s

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