toolchain: do not error out on all LHS reallocs

... since this is exactly the purpose of `ALLOCATABLE`'s

tools/toolchain/scripts/generate_arch_files.sh

@@ -36,7 +36,7 @@ NOOPT_FLAGS="-O1"
 
 # those flags that do not influence code generation are used always, the others if debug
 FCDEB_FLAGS="-ffree-form -std=f2008 -fimplicit-none"
-FCDEB_FLAGS_DEBUG="-fsanitize=leak -fcheck=all -ffpe-trap=invalid,zero,overflow -finit-derived -finit-real=snan -finit-integer=-42 -Werror=realloc-lhs-all -finline-matmul-limit=0"
+FCDEB_FLAGS_DEBUG="-fsanitize=leak -fcheck=all -ffpe-trap=invalid,zero,overflow -finit-derived -finit-real=snan -finit-integer=-42 -Werror=realloc-lhs -finline-matmul-limit=0"
 
 # code coverage generation flags
 COVERAGE_FLAGS="-O1 -coverage -fkeep-static-functions"