Helpers; could we use triplets for the platform. Now, I don't really …

…understand the implications, but it'd make sense, since I have been experiementing with --host=i686-linux-musl and thus 'linux-x86-musl' as meson configuration

src/linux/helpers/Makefile

@@ -1,4 +1,4 @@
-top_srcdir := ../../..
+top_srcdir := ../../../..
 releng := $(top_srcdir)/releng
 
 BUILDDIR ?= $(top_srcdir)/build
@@ -7,14 +7,15 @@ FRIDA_MONOREPO ?= $(top_srcdir)/..
 ifdef FRIDA_HOST
 host_os := $(shell echo $(FRIDA_HOST) | cut -f1 -d"-")
 host_arch := $(shell echo $(FRIDA_HOST) | cut -f2 -d"-")
+host_variant := $(shell echo $(FRIDA_HOST) | cut -f3 -d"-")
 else
 host_os := $(shell $(releng)/detect-os.sh)
 host_arch := $(shell $(releng)/detect-arch.sh)
 endif
 
 crossfile := $(shell test -d "$(BUILDDIR)" \
-		&& echo "$(BUILDDIR)/frida-$(host_os)-$(host_arch).txt" \
-		|| echo $(FRIDA_MONOREPO)/build/frida*-$(host_os)-$(host_arch).txt)
+		&& echo "$(BUILDDIR)/frida-$(host_os)-$(host_arch)-$(host_variant).txt" \
+		|| echo $(FRIDA_MONOREPO)/build/frida*-$(host_os)-$(host_arch)-$(host_variant).txt)
 
 build: ext/linux/tools/include/nolibc/nolibc.h
 	rm -rf build