Extended printf test with new strings cases

[shajder]

According to work plan from issue #1058

Corrections to general test: -removed duplication of separate tests for each element of PrintfTestType vector, instead doTest procedure would iterate over vector related to specific PrintfTestType automaticaly -fixed procedure to assemble kernel source so it can accept only one parameter of the function ( eg. printf("%%"); ) -incorporated important modifications from #1940 to avoid expected conflicts -warnings fixes, minor corrections, clang format

Extension for string testing: -special symbols -nested symbols -all ascii characters -added new type of test TYPE_FORMAT_STRING to verify format string only (according to request from the issue)