Build system: Apply warning flags consistently to performance tests

Ensure that performance test tools are compiled with project warning flags
(NDPI_CFLAGS) for consistent code quality standards across the codebase.

Previously, tests/performance/Makefile.in compiled tools (gcrypt-int,
gcrypt-gnu, substringsearch, strnstr, geo, patriciasearch) with only
user-provided CFLAGS, missing the project's warning flags (-W, -Wall,
-Wno-address-of-packed-member).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: IvanNardi

tests/performance/Makefile.in

@@ -17,19 +17,19 @@ all: $(TESTS)
 tools: $(TOOLS)
 
 gcrypt-int: $(srcdir)/gcrypt.c Makefile $(GEN_HEADERS)
-	$(CC) $(INC) @CFLAGS@ $(srcdir)/gcrypt.c -o $@
+	$(CC) $(INC) @NDPI_CFLAGS@ @CFLAGS@ $(srcdir)/gcrypt.c -o $@
 
 gcrypt-gnu: $(srcdir)/gcrypt.c Makefile $(GEN_HEADERS)
-	$(CC) $(INC) @CFLAGS@ -DHAVE_LIBGCRYPT $(srcdir)/gcrypt.c -o $@ -lgcrypt
+	$(CC) $(INC) @NDPI_CFLAGS@ @CFLAGS@ -DHAVE_LIBGCRYPT $(srcdir)/gcrypt.c -o $@ -lgcrypt
 
 substringsearch: $(srcdir)/substringsearch.c Makefile $(GEN_HEADERS)
-	$(CC) $(INC) @CFLAGS@ $(srcdir)/substringsearch.c -o substringsearch $(LIB)
+	$(CC) $(INC) @NDPI_CFLAGS@ @CFLAGS@ $(srcdir)/substringsearch.c -o substringsearch $(LIB)
 
 strnstr: $(srcdir)/strnstr.cpp Makefile $(GEN_HEADERS)
-	$(CXX) $(INC) @CFLAGS@ $(srcdir)/strnstr.cpp -o strnstr
+	$(CXX) $(INC) @NDPI_CFLAGS@ @CFLAGS@ $(srcdir)/strnstr.cpp -o strnstr
 
 geo: $(srcdir)/geo.c Makefile $(GEN_HEADERS)
-	$(CC) $(INC) @CFLAGS@ $(srcdir)/geo.c -o geo $(LIB)
+	$(CC) $(INC) @NDPI_CFLAGS@ @CFLAGS@ $(srcdir)/geo.c -o geo $(LIB)
 
 substring_test: substringsearch top-1m.csv
 	./substringsearch
@@ -43,7 +43,7 @@ geo_test: geo
 #
 
 patriciasearch: $(srcdir)/patriciasearch.c Makefile $(GEN_HEADERS)
-	$(CC) $(INC) @CFLAGS@ $(srcdir)/patriciasearch.c -o patriciasearch $(LIB)
+	$(CC) $(INC) @NDPI_CFLAGS@ @CFLAGS@ $(srcdir)/patriciasearch.c -o patriciasearch $(LIB)
 
 patricia_test: patriciasearch blacklist-ip.txt
 	./patriciasearch