Fix persisting missing make variables (#2881)

Persist USE_FAST_FLOAT and PROG_SUFFIX to prevent a complete rebuild
next time someone types make or make test without specifying variables.

Fixes #2880

Signed-off-by: Viktor Söderqvist <[email protected]>

Author: zuiderkwast

src/Makefile

@@ -461,10 +461,12 @@ persist-settings: distclean
 	echo STD=$(STD) >> .make-settings
 	echo WARN=$(WARN) >> .make-settings
 	echo OPT=$(OPT) >> .make-settings
+	echo PROG_SUFFIX=$(PROG_SUFFIX) >> .make-settings
 	echo MALLOC=$(MALLOC) >> .make-settings
 	echo BUILD_TLS=$(BUILD_TLS) >> .make-settings
 	echo BUILD_RDMA=$(BUILD_RDMA) >> .make-settings
 	echo USE_SYSTEMD=$(USE_SYSTEMD) >> .make-settings
+	echo USE_FAST_FLOAT=$(USE_FAST_FLOAT) >> .make-settings
 	echo CFLAGS=$(CFLAGS) >> .make-settings
 	echo LDFLAGS=$(LDFLAGS) >> .make-settings
 	echo SERVER_CFLAGS=$(SERVER_CFLAGS) >> .make-settings