Build with -ffloat-store on i386

This works around the excess precision of the x87 FPU that causes
https://buildd.debian.org/status/logs.php?pkg=libpappsomspp&arch=i386

Thanks to Adrian Bunk (https://salsa.debian.org/bunk) for the fix.

debian/rules

@@ -11,6 +11,11 @@ export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 DPKG_EXPORT_BUILDFLAGS = 1
 include /usr/share/dpkg/buildflags.mk
 
+ifneq (,$(filter $(DEB_HOST_ARCH_CPU), i386))
+  export DEB_CXXFLAGS_MAINT_APPEND += -ffloat-store
+endif
+
+
 %:
 	dh $@ --buildsystem=cmake