Revert "Merge 'build-pdb' into HEAD"

Fixes git-for-windows/git#356

This reverts commit 27e5516, reversing
changes made to a1a4754.

Signed-off-by: Dakota Hawkins <dakotahawkins@gmail.com>

winsup/cygwin/Makefile.in

@@ -592,7 +592,7 @@ install-libs: $(TARGET_LIBS)
 	for i in $^; do \
 	    $(INSTALL_DATA) $$i $(DESTDIR)$(tooldir)/lib/`basename $$i` ; \
 	done
-	$(INSTALL_DATA) msys-2.0.pdb $(DESTDIR)$(bindir)/msys-2.0.pdb
+	$(INSTALL_DATA) msys-2.0.dbg $(DESTDIR)$(bindir)/msys-2.0.dbg
 	cd $(DESTDIR)$(tooldir)/lib && ln -sf libmsys-2.0.a libg.a
 
 install-headers:
@@ -658,7 +658,7 @@ uninstall-man:
 	done
 
 clean distclean realclean:
-	-rm -f *.o *.dll *.pdb *.a *.exp junk *.base version.cc *.exe *.d *stamp* *_magic.h sigfe.s msys.def globals.h
+	-rm -f *.o *.dll *.dbg *.a *.exp junk *.base version.cc *.exe *.d *stamp* *_magic.h sigfe.s msys.def globals.h
 	-@$(MAKE) -C ${cygserver_blddir} libclean
 
 maintainer-clean: clean
@@ -672,17 +672,15 @@ $(LDSCRIPT): $(LDSCRIPT).in
 	$(CC) -E - -P < $^ -o $@
 
 # Rule to build msys-2.0.dll
-$(TEST_DLL_NAME): $(LDSCRIPT) $(DLL_OFILES) $(LIBSERVER) $(LIBC) $(LIBM) $(API_VER) Makefile $(VERSION_OFILES)
+$(TEST_DLL_NAME): $(LDSCRIPT) dllfixdbg $(DLL_OFILES) $(LIBSERVER) $(LIBC) $(LIBM) $(API_VER) Makefile $(VERSION_OFILES)
 	$(CXX) $(CXXFLAGS) \
 	-mno-use-libstdc-wrappers -L${WINDOWS_LIBDIR} \
 	-Wl,--gc-sections $(nostdlib) -Wl,-T$(firstword $^) -static \
 	-Wl,--heap=0 -Wl,--out-implib,msysdll.a -shared -o $@ \
 	-e $(DLL_ENTRY) $(DEF_FILE) $(DLL_OFILES) $(VERSION_OFILES) \
 	$(MALLOC_OBJ) $(LIBSERVER) $(LIBM) $(LIBC) \
 	-lgcc $(DLL_IMPORTS) -Wl,-Map,msys.map
-	MINGW_PREFIX=/mingw32 && \
-	case "$$(uname -m)" in x86_64) MINGW_PREFIX=/mingw64;; esac && \
-	$$MINGW_PREFIX/bin/cv2pdb "$@" "$@" ${patsubst %0.dll,%-2.0.pdb,$@}
+	@$(word 2,$^) $(OBJDUMP) $(OBJCOPY) $@ ${patsubst %0.dll,%-2.0.dbg,$@}
 	@ln -f $@ new-$(DLL_NAME)
 
 # Rule to build libmsys-2.0.a