Use $(CXXFLAGS) and $(LDFLAGS) in the --find-package test Makefile

This should make the test succeed in the coverage builds, where CXXFLAGS
and LDFLAGS are set accordingly.

Alex

Tests/FindPackageModeMakefileTest/Makefile.in

@@ -1,10 +1,10 @@
 all: clean pngtest
 
 main.o: main.cpp
-	"@CMAKE_CXX_COMPILER@" -c $(shell "@cmakeExecutable@" --find-package -DCMAKE_MODULE_PATH="@CMAKE_CURRENT_BINARY_DIR@" -DNAME=Foo -DLANGUAGE=CXX -DCOMPILER_ID=@CMAKE_CXX_COMPILER_ID@ -DMODE=COMPILE) main.cpp
+	"@CMAKE_CXX_COMPILER@" $(CXXFLAGS) -c $(shell "@cmakeExecutable@" --find-package -DCMAKE_MODULE_PATH="@CMAKE_CURRENT_BINARY_DIR@" -DNAME=Foo -DLANGUAGE=CXX -DCOMPILER_ID=@CMAKE_CXX_COMPILER_ID@ -DMODE=COMPILE) main.cpp
 
 pngtest: main.o
-	"@CMAKE_CXX_COMPILER@" -o pngtest main.o $(shell "@cmakeExecutable@" --find-package -DCMAKE_MODULE_PATH="@CMAKE_CURRENT_BINARY_DIR@" -DNAME=Foo -DLANGUAGE=CXX -DCOMPILER_ID=@CMAKE_CXX_COMPILER_ID@ -DMODE=LINK)
+	"@CMAKE_CXX_COMPILER@" $(LDFLAGS) -o pngtest main.o $(shell "@cmakeExecutable@" --find-package -DCMAKE_MODULE_PATH="@CMAKE_CURRENT_BINARY_DIR@" -DNAME=Foo -DLANGUAGE=CXX -DCOMPILER_ID=@CMAKE_CXX_COMPILER_ID@ -DMODE=LINK)
 
 clean:
 	rm -f *.o pngtest