add bitcoin-qt.rc to OTHER_FILES (shown in Qt Creator)

bitcoin-qt.pro

@@ -266,7 +266,7 @@ PRE_TARGETDEPS += compiler_TSQM_make_all
 
 # "Other files" to show in Qt Creator
 OTHER_FILES += \
-    doc/*.rst doc/*.txt doc/README README.md
+    doc/*.rst doc/*.txt doc/README README.md res/bitcoin-qt.rc
 
 # platform specific defaults, if not overridden on command line
 isEmpty(BOOST_LIB_SUFFIX) {