linux: microoptimize futimesat.

[dchagin]

make it more readable

sys/compat/linux/linux_misc.c

progs=$$(for prog in ${ITOOLS}; do \
                 if progpath=`env PATH=${TMPPATH} which $$prog`; then \
                         echo $$progpath; \
                 else \
                         echo "Required tool $$prog not found in PATH ($$PATH)." >&2; \
                         exit 1; \
                 fi; \
             done); \
         if [ -z "${CROSSBUILD_HOST}" ] ; then \
-                libs=$$(ldd -f "%o %p\n" -f "%o %p\n" $$progs 2>/dev/null | sort -u | \
+                libs=$$(ldd -f "%o %p\n" -f "%o %p\n" $$progs 2>/dev/null | sort -u | grep -Ev '\[.*]' | \
                     while read line; do \
-                        case $$line in \
-                        "["*"]") \
-                                continue;; \
-                        esac; \
                         set -- $$line; \
                         if [ "$$2 $$3" != "not found" ]; then \
                                 echo $$2; \
                         else \
                                 echo "Required library $$1 not found." >&2; \
                                 exit 1; \
                         fi; \
                     done); \