target: update default /etc/issue and /etc/hostname

Adjust default /etc/issue to print 'Welcome to Buildroot' like the
recently removed BR2_BANNER did, and adjust default hostname to be
'buildroot' instead of uclibc as we now support external glibc
toolchains as well.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

target/device/Atmel/root/target_busybox_skeleton/etc/hostname

@@ -1 +1 @@
-uclibc
+buildroot

target/device/Atmel/root/target_busybox_skeleton/etc/issue

@@ -1,4 +1,3 @@
 
-
-Welcome to the Erik's uClibc development environment.
+Welcome to Buildroot
 

target/device/Atmel/root/target_skeleton/etc/hostname

@@ -1 +1 @@
-uclibc
+buildroot

target/device/Atmel/root/target_skeleton/etc/issue

@@ -1,4 +1,3 @@
 
-
-Welcome to the Erik's uClibc development environment.
+Welcome to Buildroot
 

target/generic/target_busybox_skeleton/etc/hostname

@@ -1 +1 @@
-uclibc
+buildroot

target/generic/target_busybox_skeleton/etc/issue

@@ -1,4 +1,3 @@
 
-
-Welcome to the Erik's uClibc development environment.
+Welcome to Buildroot
 

target/generic/target_skeleton/etc/hostname

@@ -1 +1 @@
-uclibc
+buildroot

target/generic/target_skeleton/etc/issue

@@ -1,4 +1,3 @@
 
-
-Welcome to the Erik's uClibc development environment.
+Welcome to Buildroot