Fix again stack generation on the Raspberry Pi.

The fix was removed by f6627a3e6 attempting to fix the stack generation
on ARM64, without testing if it would still work on ARM32.
Now it should work both sides.

src/Makefile

@@ -41,6 +41,10 @@ endif
 # To get ARM stack traces if Redis crashes we need a special C flag.
 ifneq (,$(filter aarch64 armv,$(uname_M)))
         CFLAGS+=-funwind-tables
+else
+ifneq (,$(findstring armv,$(uname_M)))
+        CFLAGS+=-funwind-tables
+endif
 endif
 
 # Backwards compatibility for selecting an allocator