A few minor clarifications on running examples

Signed-off-by: Joshua Fife <jpfife17@gmail.com>

docs/building-examples.rst

@@ -1,3 +1,4 @@
+
 Building example designs
 ========================
 
@@ -56,7 +57,7 @@ Enter the directory that contains examples for Xilinx 7-Series FPGAs:
 .. code-block:: bash
    :name: enter-dir-xc7
 
-   cd xc7
+   cd symbiflow-examples/xc7
 
 .. jinja:: xc7_counter_test
    :file: templates/example.jinja

xc7/linux_litex_demo/README.rst

@@ -19,7 +19,14 @@ run the following commands:
    ./digilent_arty.py --toolchain symbiflow --cpu-type vexriscv --build
    cd -
 
-To build the linux-litex-demo example, depending on your hardware, run:
+To build the linux-litex-demo example, first re-navigate to the directory that contains examples for Xilinx 7-Series FPGAs:
+
+.. code-block:: bash
+   :name: enter-dir-xc7
+   
+   cd symbiflow-examples/xc7
+
+Then depending on your hardware, run:
 
 .. code-block:: bash
    :name: example-litex-a35t-group

xc7/picosoc_demo/README.rst

@@ -2,7 +2,15 @@ PicoSoC demo
 ~~~~~~~~~~~~
 
 This example features a picorv32 soft CPU and a SoC based on it. To build the
-picosoc example, run the following commands:
+picosoc example, first navigate to the directory that contains examples for Xilinx 7-Series FPGAs:
+
+.. code-block:: bash
+   :name: enter-dir-xc7
+   
+   cd symbiflow-examples/xc7
+   
+
+Then run the following commands:
 
 .. code-block:: bash
    :name: example-picosoc-a35t-group