*-symbols-check: use normal shell over bash

None of the tests are bash specific. Tested with bash, zsh, dash, mksh
and ksh.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Tested-by: Niclas Zeising <zeising@daemonic.se>
Reviewed-by: Niclas Zeising <zeising@daemonic.se>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>

amdgpu/amdgpu-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

etnaviv/etnaviv-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

exynos/exynos-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

freedreno/freedreno-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

intel/intel-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

libkms/kms-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

nouveau/nouveau-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

omap/omap-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

radeon/radeon-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u
 

tegra/tegra-symbol-check

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -u