fixed #1811: getStringWithContentsOfFile ~> getStringFromFile .
Merge pull request #2122 from dumganhar/iss1811

fixed #1811: getStringWithContentsOfFile ~> getStringFromFile .
Merge pull request #2121 from dumganhar/master

fixed #1812: A warning of getStringWithEllipsisJni function when compiling it with clang.