[snipmatch] Bug 441661: "Create snippet" should escape $

SnippetCodeBuilder class modified..

Change-Id: I1d1e0b58c5004b08a9cd66d05070619ad6f9f013
Signed-off-by: Simon Laffoy <simon.laffoy@codetrails.com>
Merge "[snipmatch] Bug 441661: "Create snippet" should escape $"