Applied patch to qrexec Makefile to prevent compile failure on warnings
qrexec: Disable all warnings being treated as errors
gcc -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -I. -g -Wall -Wextra -Werror -pie -fPIC `pkg-config --cflags vchan-xen` -D_FORTIFY_SOURCE=2 -c -o qrexec-agent-data.o qrexec-agent-data.c
qrexec-agent-data.c: In function 'handle_remote_data':
qrexec-agent-data.c:217:17: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing]
status = *(unsigned int *)buf;
^
cc1: all warnings being treated as errors
<builtin>: recipe for target 'qrexec-agent-data.o' failed
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