Use gzip rather than brotli for blink resources

Use gzip rather than brotli for blink resources

On upstream, commit [1] sets brotli compression as default compression
method for Blink resources, but it causes some issue on 7.5 platform.
This patch disables brotli and sets gzip as default for efl port.

[1] https://chromium-review.googlesource.com/c/chromium/src/+/3373050

With respect to content_shell.pak size, the difference is only ~100KB.
Brotli : 11907652
gzip : 12010220

Change-Id: I7c76e2904b392ec0615e0f4157820d5dac8f630d
Signed-off-by: Gajendra N <gajendra.n@samsung.com>