dxr: Handle strings and comments within preprocessor macros
dxr: Handle strings and comments within preprocessor macros

This is so those are handled as clickable when the HTML is generated
https://bugzilla.mozilla.org/show_bug.cgi?id=748378

nrc/dxr,jonasfj/dxr,jonasfj/dxr,nrc/dxr,bozzmob/dxr,pombredanne/dxr,nrc/dxr,srenatus/dxr,pelmers/dxr,gartung/dxr,kleintom/dxr,jay-z007/dxr,jay-z007/dxr,jay-z007/dxr,jbradberry/dxr,pombredanne/dxr,nrc/dxr,jbradberry/dxr,jbradberry/dxr,kleintom/dxr,pombredanne/dxr,pelmers/dxr,erikrose/dxr,gartung/dxr,gartung/dxr,KiemVM/Mozilla--dxr,kleintom/dxr,srenatus/dxr,jbradberry/dxr,jay-z007/dxr,pombredanne/dxr,pelmers/dxr,erikrose/dxr,srenatus/dxr,pombredanne/dxr,jonasfj/dxr,pelmers/dxr,pombredanne/dxr,jay-z007/dxr,pelmers/dxr,KiemVM/Mozilla--dxr,jonasfj/dxr,jbradberry/dxr,jbradberry/dxr,kleintom/dxr,nrc/dxr,KiemVM/Mozilla--dxr,srenatus/dxr,gartung/dxr,gartung/dxr,erikrose/dxr,bozzmob/dxr,srenatus/dxr,bozzmob/dxr,kleintom/dxr,nrc/dxr,erikrose/dxr,jonasfj/dxr,pombredanne/dxr,pelmers/dxr,KiemVM/Mozilla--dxr,kleintom/dxr,bozzmob/dxr,pelmers/dxr,erikrose/dxr,KiemVM/Mozilla--dxr,jonasfj/dxr,bozzmob/dxr,kleintom/dxr,bozzmob/dxr,srenatus/dxr,jay-z007/dxr,jay-z007/dxr,KiemVM/Mozilla--dxr,bozzmob/dxr,gartung/dxr,jbradberry/dxr,gartung/dxr