eglibc: force make to use /bin/bash

The eglibc core build still has a number of issues with /bin/dash.
Recently found is both sysdeps/unix/make-syscalls.sh and it's output,
which make calls via SHELL do not play well with /bin/dash. By force
make to use /bin/bash via SHELL setting it works correctly.

Currenly known issues are: make-syscalls.sh line with a bad substitution,
which can be corrected by:
     vdso_symver="$(printf '%s\n' ${vdso_symver} | sed 's/\./_/')"

Following that there is an issue with emiting a '\n' through a second
echo and then to the compiler. There maybe more issues beyond that.

[YOCTO #3080]

(From OE-Core rev: 9d002f7cdc5309c4d850a76e4fd73ff04c980a07)

Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/eglibc/eglibc.inc

@@ -51,6 +51,11 @@ EXTRA_OEMAKE[vardepsexclude] += "EGLIBCPARALLELISM"
 EXTRA_OEMAKE += "${EGLIBCPARALLELISM}"
 PARALLEL_MAKE = ""
 
+# eglibc make-syscalls.sh has a number of issues with /bin/dash and
+# it's output which make calls via the SHELL also has issues, so 
+# ensure make uses /bin/bash
+EXTRA_OEMAKE += "SHELL=/bin/bash"
+
 OE_FEATURES = "${@features_to_eglibc_settings(d)}"
 do_configure_prepend() {
 	sed -e "s#@BASH@#/bin/sh#" -i ${S}/elf/ldd.bash.in

meta/recipes-core/eglibc/eglibc_2.16.bb

@@ -3,7 +3,7 @@ require eglibc.inc
 SRCREV = "20393"
 
 DEPENDS += "gperf-native kconfig-frontends-native"
-PR = "r14"
+PR = "r15"
 PR_append = "+svnr${SRCPV}"
 
 EGLIBC_BRANCH="eglibc-2_16"