introduce bb_putchar(). saves ~1800 on uclibc (less on glibc).

diff --git a/e2fsprogs/old_e2fsprogs/blkid/dev.c b/e2fsprogs/old_e2fsprogs/blkid/dev.c
index eddbd02..d86cc48 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/dev.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/dev.c
@@ -82,7 +82,7 @@
 		else
 			printf("    tag: NULL\n");
 	}
-	puts("");
+	bb_putchar('\n');
 }
 #endif
 
diff --git a/e2fsprogs/old_e2fsprogs/blkid/read.c b/e2fsprogs/old_e2fsprogs/blkid/read.c
index 276e62a..67bc8ee 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/read.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/read.c
@@ -436,7 +436,7 @@
 		else
 			printf("    tag: NULL\n");
 	}
-	puts("");
+	bb_putchar('\n');
 }
 
 int main(int argc, char**argv)