Revert "setools: fix race condition"

This reverts commit 1ac68fe2c9b4cea91c7a30429ebf75279ede8e70.

Further investigations revealed that the problem wasn't a race condition
but the lack of flex package in the host machine:

  https://github.com/TresysTechnology/setools3/issues/5#issuecomment-144048612

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/setools/setools.mk

@@ -12,10 +12,6 @@ SETOOLS_INSTALL_STAGING = YES
 SETOOLS_LICENSE = GPLv2+ LGPLv2.1+
 SETOOLS_LICENSE_FILES = COPYING COPYING.GPL COPYING.LGPL
 
-# Race condition reported upstream:
-# https://github.com/TresysTechnology/setools3/issues/5
-SETOOLS_MAKE = $(MAKE1)
-
 # configure.ac is patched by the cross compile patch,
 # so autoreconf is necessary
 SETOOLS_AUTORECONF = YES