fix typo

Author: kkent030315

lld/test/COFF/nodbgdirmerge.test

@@ -2,7 +2,7 @@ RUN: yaml2obj %p/Inputs/pdb1.yaml -o %t1.obj
 RUN: yaml2obj %p/Inputs/pdb2.yaml -o %t2.obj
 RUN: rm -f %t.dll %t.pdb
 
-## Check that it emits the debug directory in .build section when
+## Check that it emits the debug directory in .cvinfo section when
 ## /nodbgdirmerge is specified
 RUN: lld-link /debug /pdb:%t.pdb /pdbaltpath:test.pdb /dll /out:%t.dll \
 RUN:   /entry:main /nodefaultlib /nodbgdirmerge %t1.obj %t2.obj