hifive1: Rename the layout file

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index 9a91eaa..f5aa880 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -47,6 +47,6 @@
 script:
   - ./run_all_checks.sh
   # Run a QEMU instance of the HiFive1 app
-  - PLATFORM=riscv32 cargo rrv32imac --example hello_world
-  - timeout --foreground 10s qemu-system-riscv32 -M sifive_e -kernel ../tock/boards/hifive1/target/riscv32imac-unknown-none-elf/release/hifive1 -device loader,file=./target/riscv32imac-unknown-none-elf/tab/riscv32/hello_world/rv32imac.tbf,addr=0x20430000 -nographic | tee serial
+  - PLATFORM=hifive1 cargo rrv32imac --example hello_world
+  - timeout --foreground 10s qemu-system-riscv32 -M sifive_e -kernel ../tock/boards/hifive1/target/riscv32imac-unknown-none-elf/release/hifive1 -device loader,file=./target/riscv32imac-unknown-none-elf/tab/hifive1/hello_world/rv32imac.tbf,addr=0x20430000 -nographic | tee serial
   - grep "Hello Tock World" serial

boards/layout_hifive1.ld

diff --git a/boards/layout_riscv32.ld b/boards/layout_hifive1.ld
similarity index 100%
rename from boards/layout_riscv32.ld
rename to boards/layout_hifive1.ld

build_examples.sh

diff --git a/build_examples.sh b/build_examples.sh
index fd67b75..738523d 100755
--- a/build_examples.sh
+++ b/build_examples.sh
@@ -4,4 +4,4 @@
 
 PLATFORM=nrf52 cargo build --release --target=thumbv7em-none-eabi --examples
 PLATFORM=nrf52 cargo build --release --target=thumbv7em-none-eabi --examples --features=alloc
-PLATFORM=riscv32 cargo build --release --target=riscv32imc-unknown-none-elf --examples # Important for testing: This target does not support atomics
+PLATFORM=hifive1 cargo build --release --target=riscv32imc-unknown-none-elf --examples # Important for testing: This target does not support atomics

flash.sh

diff --git a/flash.sh b/flash.sh
index b241a7a..7d20190 100755
--- a/flash.sh
+++ b/flash.sh
@@ -16,7 +16,7 @@
         binary_name=cortex-m4.elf
         tockload=y
         ;;
-    "riscv32")
+    "hifive1")
         tockloader_flags=""
         binary_name=rv32imac.elf
         tockload=n